I bought my wife the new iPhone 3g, it is a great device, fantastic actually not other phone can do what it can do. What I mean by that is how it makes you feel when your using it, its fun and sorta magic. That being said the magic gets real old after serious usage. Battery life is much less than any berry I have everused.
Blackberrys get business done faster, the OS continues to improve. Email is still the blackberry's specialty. (Changing email boxes is horrible on the iPhone) Still no real push for the iPhone but greatly improved from the first OS.
But dude why are you coming here, I highly doubt you had your curve for more than 6 months and if you did you may need a phone with an easier OS and some status to boost your self esteem.